On September 24, 2014 a Bash vulnerability was discovered that could lead to arbitrary code execution. The bash shell is used in many operating systems, including Linux, BSD and Mac OS X.
After some testing I found out that my RamNode VPS (running Ubuntu Server 13.10) is vulnerable to the exploit. Sadly, this release of Ubuntu Server is unsupported and doesn't receive Bash updates!
Fortunately there is a way to manually update Bash and patch the vulnerability. In this post I'll show you how to check if your vulnerable and how to fix it.